/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package com.py.net.server;

import com.google.protobuf.MessageLite;
import com.py.net.bean.Global;
import com.py.net.bean.Session;
import com.py.net.proto.ProtoMapper;
import com.py.net.proto.ProtoMapper.ProtoMapperEnum;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;

/**
 * Handles a server-side channel.
 */
public class ServerHandler extends SimpleChannelInboundHandler<MessageLite> {
	
    @Override
    public void channelActive(final ChannelHandlerContext ctx) {
    	Session client = new Session(ctx.channel());
    	ctx.channel().attr(ServerAttributeKey.SessionKey).set(client);
    	System.out.println("client active!");
    }

    @Override
    public void channelRead0(ChannelHandlerContext ctx, MessageLite msg) throws Exception {
    	ProtoMapperEnum e = ProtoMapper.getProtoMapperEnum(msg.getClass());
    	e.handle.session = ctx.channel().attr(ServerAttributeKey.SessionKey).get();
    	MessageLite retMsg = e.handle.handle0(msg);
    	if (retMsg != null) {
			ctx.writeAndFlush(retMsg);
		}
    }
    
    @Override
    public void channelInactive(ChannelHandlerContext ctx) throws Exception {
    	Session session = ctx.channel().attr(ServerAttributeKey.SessionKey).get();
    	if (session.user != null) {
    		session.user.offline();
    		Global.userMap.remove(session.user.id);
		}
    	super.channelInactive(ctx);
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
        cause.printStackTrace();
        ctx.close();
    }
}
